Spun-metal manufacture



` Sept. 16, 1930. l R, G; NELSON 1,775,732

SPUN METAL MANUFACTURE Filed Nov. 5, 1926 5 Sheets-Sheet 2 e HmmmJHIHIIM MMU Sept. 16, 1930.

Filed Nov. 5. 1926 5 Sheets-Sheet 3 El 14 i in MW Sept. 16, v1930. i RG, NELSON x 1,775,732

SPUN METAL MANUFACTURE Filed Nov. 5, 1926 5 Sheets-Sheet 4 fz. t Nmo/l54M WM @Hoz ne ad sept. 16, 1930.l

' R. G. NELSON sPUH METAL MANUFACTURE Filed NOV. 5, 1926 s sheets-sheet5 ik@ a Patented Sept. 16, 1930 l UNITED sTATEs PATENT `OFFICE REYNOLDG. NELSON, F CANTON, OHIO, ASSIGNOR 0F ONE-HALF T0 THE SPUN STEELCORPORATION, OF CANTON, OHIO, A CORPORATION OF OHIO SPUN -METALMANUFACTURE Application led November 5, 1.926. Serial No. 146,365.

m diators having filler tube inlets provided with internal threads attheir ends for receiving an externally threaded radiator filler tubecap, and for appearance' and strength the filler tubes maybe externallygrooved below 1r, the internally threaded ends.

In producing such radiator filler tubes having internally. threadedends, it has been necessary to cutwith dies or other cutt1ng tools, theinternal threads in theends there- :n of, and such internal threadcutting operations have been relatively expensive.

The principal. object of the present improveme'nts is to provideapparatus and methods for spinning internal threads upon the inside oftubular articles such as radi-= ator filler tubes; and a further objectof the improvements is to provide an apparatus and method for spinningan internally threaded and externally grooved radiator tube during :zo asingle continuous rotation of the improved spinning arbor of theimproved apparatus.

These and ancillary-objects are attained in the lpresent improvements bya construction and arrangement which may be described in general termsas including in combination with a spinning apparatus which preferablymay be of the type set l forth in my application for U. S. LettersPatent kfor metal spinning apparatus, Serial No. 134,432, filedSeptember 9, 1926, an improved internal thread spinning arbor, improveddouble rotary spinning rolls, improved double trimming tools, improvedmeans for inserting blank cups and the like on the arbor,A and improvedfiller 47 tube stripping means.

A preferred embodimentof the apparatus of the invention is illustratedin the accompanying drawings forming part hereof, in which 3U Figure 1is a fragmentary plan view, with throughout the drawings.

portions in section of the improved metal spinning apparatus, theoperations for s inning a filler tube as aforesaid having ]ust beencompleted and the apparatus being in readiness for the next trimmingoperatlon; y

Fig..2, a fragmentary front elevation of the same, portions beingillustrated in seetion, and the tool holder and trimming mechanism beingremoved, and the apparatus being illustrated as just having had a blank,cup inserted upon the improved internal thread spinning arbor by meansof the tail-l stock provided with the improved cup inserting sleeve;Fig. 3, a fragmentary view similar to Fig. 2, illustrating theoperation. of the improved filler tube stripping mechanism of theapparatus; l

Fig. 4a fragmentary view as online 4 4, Fig. l, illustrating theimproved trimming mechanism, and braking mechanism for operating the'improved arbor, in inoperative position, the s inning tools beingremoved for purposes o clearness of illustration; Fig. 5, a view similarto Fig. 4, the trimming tools havin been operated, and the arbor brakebeing in operative osition;

Fig. 6, a fragmentary enlarged) view'similar to Fig. 1, with portions insection illustratng more clearly the improved internal thread spinningarbor and other parts of the apparatus;

Fig. 7, perspective views of the improved thread rolLand the improvedinternal thread spinning arbor, the thread roll being removed from thearbor, after a filler tube has been spun and trimmed; and l Fig. 8, aperspective view of an internall threaded filler tube made by the use ofthe imroved apparatus` and methods herein set orth, together with aperspective view of the ller tube cap therefor about to be screwedtherein. d y y "Similar numeralsv referto similar parts The 'mprovedapparatus for spinning internally'threaded'radiator filler tubes and thelike, may include the improved metal spinning apparatus indicatedgenerally at k1 and as illustrated and described in my copending vapplication for U. S. Letters Patent,-Serial No. 134,432, and whichimproved apparatus includes a bed 2, having an improved spinningheadstock 4 adjustably mounted in a well known manner at a desiredlongitudinal location thereon, and an improved tailstock 5 likewise adjustably mounted upon the bed in a well known manner at a desiredlongitudinal i location adjacent the headstock.

Between the headstock and the tailstock a longitudinal feed carriage 6is mounted in a well known manner for longitudinal movement between theheadstock and the tailstock by rotation of the longitudinal feedcarriage control wheel 7. A cross feed carriage 8 is for operativeconnection with a power shaft, 'not shown. At the spinning end 17 of theheadstock the spindle shaft 15, which is preferably tubular, is providedwith an inner taper for receiving and ittng with the tapered end 19 ofthe improved thread spinning arbor 20. K

The improved tailstock 5 is provided with a longitudinal aperture 37axial with the arbor and spindle shaft, and in which aperture, screw 38is slidably keyed as by a key 38, slidable in the keywa 38 of the screw,the screw extending towar s the headstock beyond the end 39 of thetailstock adjacent the headstock and there being a thread apertured hand.wheel 40 screwed upon the screw for abut- `ment with the end 39 of thetailstock, the hub 41 of the handle being provided with an annular roove42 in whcih a tailstock hand wheel hnger 43 extends, the finger 43 beingsecured to the tailstock as by bolts 44, whereby the hand Wheelmay berotated to move the screw towards or away from the arbor.

The foregoing construction and arrangement of the bed 2, the headstock4, the tailstock 5, the longitudinal feed carriage 6, and the cross feedcarriage 8, is all in accordance with the disclosure of my applicationfor S. patent as aforesaid, Serial N o. 134,432.

The improved thread spinning arbor 20 having the tapered end 19 co-axialwith and tightly fitting into the headstock spindle shaft 15, includesalso co-axial with the headstock vspindle shaftl and with the taperedend 19, a stepped cylindric sleeve bearlng 21, and an K outwardlyextending sleeve stop flange 22 is preferably provided' between thetapered end 19 and the stepped bearing 21.

Thestop Hange 22 is preferably cylindric and externally threaded as at22', and a thrust nut 22 is screwed thereon, forming an outwardextension of the sleeve stop flange, and

also providing means for removing the arbor from the spindle driveshaft, by unscrewing the nut to abut against the outer end of thespindle shaft.

A spinning form sleeve 23 is slidably mounted on the stepped sleevebearing 21 and is provided with a pair of spaced outwardly extendingsleeve flanges 24 and 24 forming an annular brake groove 25 for thesleeve. Bushings 26 and 26 are preferably provided between the sleeveand the stepped sleeve bearing.

At its outer end the stepped sleeve bearing 21 terminates in a threadroll bearing 27 preferably of a diameter smaller than the diameter ofthe outer smaller section of the stepped sleeve bearing, and the outerthread roll bearing is provided with a plurality of axially extendingradial driving keys 28 thereon, for receiving and fitting into theplurality of longitudinally extending internal radial driving keyways 29in the thread roll 3() having its outer cylindric surfaces provided withexternal threads 31 of the proper shape for forming the desired internalthreads in-the internally threaded filler tube.

For providing tapered necks for the filler tubes just below theinternally threaded end, the sleeve 23 is provided with a tapered outerend 32, and for purposes hereinafter to be described in detail, aplurality of axially extending element grooves 33 are provided'in theouter surface of the tapered end 32 of the sleeve.

Upon the cylindric outer surface 34 of the sleeve between its taperedouter end 32 and the flange 24', a stlipping collar 35 is slidablymounted and provided with an external annular groove 36 which receivesthe upper bifurcated ends a and 45" of the vertically extendingstripping fork 45 which is mounted at its lower end upon the'endadjacent.

the arbor of a horizontally extending stripper rod 46; and the rod 46`isslidably lnounted at its end'adjacent the tailstock in hangers 47depending from a collar 48 secured upon the shaft 38 of the screw 38adjacent the inner end thereof, and preferably abutting y the end 49 ofthe threads of the screw. A stop pin. 46 extends from the rod 46 betweenthe hangers 47.

For providing convenient means' for inserting blank cups and the likeupon the arbor,the Unthreaded shaft 38 of the screw 38/6Xten`ds towardthe arbor beyond the collar 48, and formsa bearing for a cup insertingsleeve 50 slidably mounted thereon and provided with a handle 51 formoving the sleeve back and forth 'upon the shaft;`

and the shaft 38 terminates at its end adjacent the arbor,l in therotatable clamping head 52.

Upon a stub shaft 53 preferably mounted therein and extending from therear stud '13 and the cap 12, the improved trimming mechanism andspindle braking mechanism indicated generally at- 54 is operativelymounted, and includes a trimming tool supporting crank 55pivot'ally-journalled atthe outerend of the stub shaft 53, and the crankcarrying at its v,outer end a pair of spaced trimming tools,"preferablyrotary trimming tools 56 and 56. journalled upon a longitudinallyextending trimming tool shaft57 secured in the outer end of the crank55, and the cra-nk is further provided with a preferably upwardlyextendinghandle 58 for pivoting the trimming tool up and down about thestub'shaft as an axis.

Adjacent the crank 55 on the stub shaft, a sleeve flange stop arm 59 issecured, and the outer end of the stop arm extends at the tailstock sideof the sleeve iange 24 preventing longitudinal movement o f the sleeve23 upon the sleeve bearing 21. l l The braking mechanism for selectivelypreventing the normal rotation of the sleeve 23 with the sleevebearing21, includes the brake band 60 extending around the brake groove25 of the sleeve 23 and secured at its outer ends upon the stub shaft 53adjacent the stop 59, as by a screw 60'..

A brake rod 61 is mounted upon the cran 55 adjacent the trimming toolsand extends longitudinally therefrom towards the head-- stock and overthe brake band 60 whereby a downward pivoting of the crank 55 about thestub shaft 53 will eventually impinge the brake rod on top of the brakeband and tighten the same labout the brake groove to stop therotation-of the sleeve with the sleeve bearing for purposes hereinafter'to be described in detail.

The turret tool holder 10 has mounted therein a laterally extendingbracket 62 having a forked outer end which carries a preferablyhorizontal shaft 63 upon which are journalled preferably upon bearingsof the ball or roller type, a pair of spaced rotary spinnino rolls 64and 65, and the neck spinning roll 64 nearest the headstock preferablyhas the grooved peripheral contour; illustrated, and the thread spinningroll 65 neares't the tailstock preferably has a cylindric contour overthe greater portion of its peripheral surface, and the eyllndric contourbeing tapered off adjacent the headstock edge of the roll asillustrated.

The apparatus thus described in detail maybe used for spinninginternally threaded .radiator filler tubes and the like, such as thefiller tubel 66, illustrated in' Fig. 8 together with. the filler tubecap 67- therefor, by operating the a paratus as follows:

The spindle sha and arbor are rotated at a speed which may be 2250 R. P.M. A previously formed cup 62 is then inserted in the cup insertingsleeve 50 extended as illustrated in Fig. 2, and the thread roll 30having been inserted upon the thread roll bearing 27 of the'arbor 20 forbeing driven thereby through the keys 28 fitting into the keyways 29 ofthe thread roll, the clamping head 52 at the end of the shaft 38 of thescrew 38 is advanced by means of the hand wheel 4Q to clamp the disk end62 of the cup against the outer end of the thread roll whereby thethread roll and the cup extending over the same is caused to rotate withthe arbor.

The -sleeve 50 is then withdrawn as illustrated in Fig. 1, and bymanipulation of the cross feed carriage control crank 9 and thelongitudinal feed carriage control wheel 7 the cup is spun upon thelongitudinally grooved and tapered sleeve 23 and the thread roll 30, byradial lpressures applied uponthe outer surface of the cup by the spacedspinning rolls .64 and 65 as they are longitudinally moved to and froacross the surface of the rotating cup. Y

In Fig. 1, the spaced rolls are illustrated in full lines in theirextreme longitudinal position towards the tailstock and in dotted linesin their extreme longitudinal'position towards the headstock.

In Fig. 6, the spaced spinning rolls are illustrated in full lines intheir extreme longitudinal position towards the headstock and in dottedlines in their extreme longitudinal position towards the tailstock.

As best illustrated in Fig. 6 the thread spinning roll 65 serves toradially press and flow the material of the cup into the outer grooves-of` the thread roll 30, whereby internal threads of the proper shapeare formed in the end portion 68 of the cup over the threads of thevthread roll. The neck spinning roll 66 by its radial pressure and itslongitudinal travel to and fro over the skirt ofthe cup serves to form atapered neck 69 for the filler' tube upon the taperedsleeve 23, andlongitudinally extending internal ridges 70 are formed upon the insideof the tapered neck by the-pressure of the spinning roll 64 against thematerial of the cup over the element grooves 33 in the tapered sleeve23.

The peripheral surface of the thread roll 30 is preferably lunthreadedand cylindric adjacent its outer end, .whereby4 the disk endv 62" of thecup and the excess material at the end of the taperedneck may besimultaneously trimmed fromthe still rotating and now formed internallythreaded filler tube by means of the properly longitudinally spaced andpreferably rotary trimming tools 56 and 56 pivotally swung on thecrankv55 into cutting contact with the rotating filler tube capy bymeans of the lever 58 as best illustrated in Figs. 4 and 5.

The operator does not of course trim the formed fillerv tube asaforesaidv until after withdrawing the spinning rolls from contact withthe rotating filler tube, and at the same time the trimming operation isperformedl with one hand, the hand wheel 40 is turned to withdraw theclamping head 52 away from the arbor.

A further downward pivoting of the crank 55 about the stub shaft 53eventually impinges the brake rod 61 upon the top of the brake band andtightens the same about the brake groove 25, whereby rotation of thesleeve`23 and the filler tube now formed thereon and keyed thereto bythe ridges fitting in the grooves 33, is stopped, while the sleevebearing 21 still rotates, driving the thread roll 30 with it through thekeys 2K8 as aforesaid.

The stopping of the sleeve and the internally threaded filler tube uponthe rotating sleeve bearing and thread roll causes the thread roll toscrew out of the internally threaded filler tube and drop to be caughtby the operator.

After the thread roll has been removed from the still rotating arbor,the crank 55 may be again elevated and the sleeve permitted to againrotate with the sleeve bearing, and the formed and trimmed filler tubemay then be stripped from the sleeve by further movement of the screw 38away from the headstock by turning the hand wheel 40, whereby the stoppin 46 in the rod 46 is caught by the hanger 47 adjacent the headstockcausing the stripper rod 46 to be drawn away from the headstock carryingwith it the upper ends 45a and 45b of the stripping fork 45, and therebystrippingthe filler tube from the sleeve and arbor and`causing it todrop therefrom, as best illustrated in Fig. 3. Y

As best illustrated in Fig. 7, the keyways 29 in the thread roll 30 arepreferably flared, and provided with one preferably longitudinal drivingface 29 for abutment with the driving face of one of the keys 28, and anopposite diverging curved face 29, whereby the keyway has a greaterwidth at its headstock end than its tailstock end and thereby enablingthe thread roll to be placed upon the thread roll bearing as it rotateswith the spindle shaft, after which the aforesaid cycle of operationsmay berepeated and another internally threaded filler tube may be spunupon the continuously rotating arbor.

The cup 62 may be previously formed in a drawing press, or may itself bespun by the use of the spinning apparatus set forth in my priorapplica-tion, Serial No. 134,432.

lVhen it is desired to vspin external threads and the like, upon atubular material by the method herein set forth, that is, by applyingpressure on one side of material having another side in abutment withthread impressions and the like, it is obvious that the arbor herein setforth may be modified for providing a hollow central portion forreceiving the material, and the thread roll may extend around thematerial, and the spinning roll may press from the inside of thematerial against the same as it externally `abuts the internallythreaded roll.

I claim:

l. The method of spinning threads and the like in tubular material andthe like, which includes mounting the material upon an arbor having acircumferential surface fitting and contacting circumfercntially with acircumferential surface of the material, the said arbor surface havinggrooves as thread grooves thereon, clamping the material to the arbor,rotating together the arbor and the `material mounted thereon, andapplying pressure upon a surface of the material opposite the surfacecontactingwith. the arbor.

2. The method of spinning ridges and grooves in tubular material and thelike, which includes mounting the material upon an arbor having acircumferential surface fitting and contacting circumferentially with acircumferential surface of the material, the said arbor surface havingridges and grooves thereon, clamping the material to the arbor, rotatingtogetherthe arbor and the material mounted thereon, and applyingpressure upon a rsurface of the material opposite the surface contactingwith the arbor.

3. The method of spinning threads and the like in a circumferentialsurface of tubular material and the like, which includes mounting thematerial upon an arbor having a circumferential surface fitting andcontacting circumferentially with the circumferential surface of thematerial, the said arbor surface having grooves as thread groovesthereon, rotating together the arbor and material mounted thereon, andapplying roller pressure upon a surface of the material opposite thesurface contacting with the arbor for flowing the material into thearbor thread grooves and for cylindrically forming said roller pressedsurface. y

4. The method of spinning ridges and grooves in a circumferentialsurface of tubularmaterial and the like, which includes mounting thematerial upon an arbor having a circumferential surface fitting andcontacting circumferentially with the circumferential surface of thematerial, the said arbor surface having ridges and grooves thereon,rotating together the arbor and material mounted thereon, and applyingroller pressure upon a surface of the material opposite the surfacecontacting with the arbor for fiowing the material into the arborgrooves around-the ridges and for cylindrically forming said rollerpressed surface. A

5. The method of spinning threads and the like in the inner surface oftubular material and the like, which includes mounting the material uponan arbor having an outer surface fitting and contactingcircumferentially with the inner surface of the material, the said arborsurface having grooves as thread grooves thereon, clamping the materialto the arbor, rotating together the arbor and the material mountedthereon, and applying pressure upon the outer surface of the materialopposite the surface contacting With the arbor.

6. The -method of spinning ridges andV grooves in the inner surface'oftubular material and the like, which includes mounting the material uponan arbor having an outer surface fitting and contactingcircumferentially with the inner surface of the material, the said arborsurface having ridges and grooves thereon, clamping the material to thearbor, rotating together the arbor and the material mounted thereon,andv applying pressure upon the outer surface of the material oppositethe surface contacting with the arbor.

7. The method of s inning threads and the like in the inner sur ace oftubular material and the like, Which includes mounting the material uponan arbor'having an outer surface fitting and contactingcircumferentially with the inner surface of the material, the said arborsurface having grooves as thread grooves thereon, rotating together thearbor and material mounted thereon, and applying roller pressure uponthe outer surface of the material for flowing the material into thearbor thread grooves and for cylindrically forming the said materialouter surface.

` 8. vThe method of spinning ridges and grooves in the inner surface oftubular material and the like, which includes mounting the material upon'an arbor having an outer surface fitting and contactingcircumferentially With the inner surface of the material,

the said arbor surface having ridges and grooves thereon, rotatingtogether the arbor and material mounted thereon, and applyingrollerpressure upon the outer surface of the material for iowing thematerial into the arbor grooves around the rid es and for cylindricallyforming said Amaterial outer surface.

9. The method of simultaneously spinning threads and the like upon oneportion of the inner surface of the tubular material and the like andspinning a neck adjacent the threaded portion of the tubular material,.which includes mounting thematerial upon an arbor having acircumferential surface fitting and contacting circumferentially with acircumferential surface of the material, the said arbor surface, havinggrooves as thread grooves thereon and a neck groove ad]acent the threadgrooves, rotating the arbor andl thematerial mounted thereon, andsimultaneously applyingpressure upon the 'outer surface of the ymaterialover the thread grooves and over the neck groove.

' 10. The method of simultaneously spinning ridges and grooves upon aportion of the inner surface of tubular material andthe like andspinning a neck adjacent the threaded portion of the tubular material,which includes mounting the material upon an arbor having acircumferential surface fitting and contacting circumferentially with acircumferential surface of the material, the said arbor surface havingridges and grooves thereon and a neck groove adjacent the ridges andgrooves, rotating the arbor and the ma- 'l terial mounted. thereon, andsimultaneously applying pressure upon the outer surface of the materialover the ridges and grooves and over the neck groove.

11. Apparatus for simultaneously spinning threads and the like upon .oneportion of the inner surface of tubular material and the like andspinning a neck adjacent the threaded portion of the tubular material,

which includes an arbor for mounting the material to be spun, the arborhaving grooves as thread grooves thereon and a neck groove adjacent thethread grooves, means for rotating the arbor and the material mountedthereon, means for clamping the material to the arbor and means forsimultaneouslyA applying pressure upon the outer surface of the materialover the thread grooves and over the neck groove.

12. Apparatus for simultaneously spinning ridges and grooves upon aportion of the inner surface of tubular material and threaded portion ofthe tubular material,

.which includes an arbor for mounting the plying pressure upon the outersurface of,l

the material over the ridges and grooves and over the neck groove.

13. Apparatus for spinning ridges in tubular material and the like,which includes an arbor having grooves therein for fitting within andmounting material to be spun, means for clamping the material to thearbor, means' Ases lthe like and spinning avneck adjacent the Y forrotating the arbor and the 'material' mounted thereon, and means forapplying pressure upon a surface of the material opposite the arborgrooves.

14. Apparatus for spinning ridges in the inner surface of tubularmaterial and the the arbor and the material mounted thereon, and meansfor applying pressure upon the outer surface of the material oppositethe arbor grooves.

15. Spinning apparatus including a rotatable arbor sleeve bearing, anarbor sleeve slidably mounted upon the bearing and normally rotatabletherewith, and means for selectively stopping rotation of the sleevewith the rotating bearing.

16. Spinning apparatus including a rotatable arbor sleeve bearing, anarbor sleeve slidably mounted upon the bearing and normally rotatabletherewith, and means for selectively stopping rotation of the sleevewith the rotating bearing, and a removable thread roll mounted upon thesleeve bearing. 17. Apparatus for spinning threads and the like intubular material and the like, which includes an arbor, means forclamping material to the arbor, and associated means for forming threadsand the like in tubular material mounted on the arbor,` and means forunscrewing the threaded material from the arbor.

18. Apparatus for spinning threads and the like in tubular material andthe like,

which includesan arbor, a removable thread roll thereon, means forclamping material 25 on the arbor and the thread roll, means for formingthreads and the like in the material mounted on the arbor and threadroll, means for simultaneously trimming the threaded material andunscrewing the thread roll therefrom, and means for stripping thethreaded material from the arbor.

19. Apparatus for spinning threads and the like in tubular material andthe like, which includes an arbor, a removable thread roll thereon,means for clamping material on the arbor and the thread roll, means fororming threads and the. likel in the material mounted on the arbor andthread roll, and means for simultaneously trimming the threaded materialand unscrewing the thread roll therefrom.

20. Spinning apparatus including a rotatable arbor, means formountingtubular material and the like on the arbor including a shaftseparate from the arbor and alined therewith, and a slidable sleeve .onthe shaft for selectively extending over the arbor.

In testimony that I claim the above, I have hereunto subscribed mynam'e.

REYNOLD e. NELSON..

